UPPERSTRUCTURE / Control Valve Assemble Overload Relief Valve-2 9. Install O-ring (2) to cap (1). Install piston (3) and cap (1) to sleeve (4). 17. Install springs (21, 20) to main poppet (26). Install pilot seat (19) to sleeve (27). Install pilot poppet (11) to pilot seat (19). 18. Align the sleeve (15) assembly with the sleeve (27) assembly before temporarily tightening. Clamp sleeve (27) into a vise. Tighten sleeve (15). : 27 mm : 50 N m (5.1 kgf m, 37 lbf ft) 10. Install lock nut (12), backup ring (13) and O-ring (14) to sleeve (4). Install backup ring (5), O-ring (6) and poppet (7) to sleeve (4). IMPORTANT:
Align the matching marks and tighten sleeve (4) to the same turns when disassembling. 11. Install the sleeve (4) assembly to sleeve (15). Tighten lock nut (12). : 36 mm : 100 N m (10 kgf m, 74 lbf ft) IMPORTANT: Install overload relief valve-2 to the original position before disassembling. Adjust pressure of overload relief valve-2 by using a test bench. (Refer to the Operational Performance Test section / TROUBLESHOOTING in the separated volume, T/M.) 19. Install overload relief valve-2 to housing (64). : 36 mm : 80 N m (8 kgf m, 59 lbf ft) 12. Install O-ring (16), spring (8), spring seat (9) and spring (10) to the sleeve (15) assembly. 13.
Install O-rings (28, 30) and backup ring (29) to sleeve (27). 14. Install backup rings (24) (2 used), O-ring (23) and piston (22) to main poppet (26). 15. Install the main poppet (26) assembly to sleeve (27). 16. Install backup ring (5) and O-ring (6) to pilot seat (19). : 41 mm NOTE: Tighten the hexagonal part of sleeve (27). : 100 N m (10 kgf m, 74 lbf ft) W2-5-51